/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.ververica.cdc.connectors.postgres.table;

import org.apache.flink.table.data.RowData;
import org.apache.flink.types.RowKind;

import com.alibaba.ververica.cdc.debezium.table.RowDataDebeziumDeserializeSchema;

/**
 * The {@link RowDataDebeziumDeserializeSchema.ValueValidator} for Postgres connector.
 */
public final class PostgresValueValidator implements RowDataDebeziumDeserializeSchema.ValueValidator {
	private static final long serialVersionUID = -1870679469578028765L;

	private static final String REPLICA_IDENTITY_EXCEPTION = "The \"before\" field of UPDATE/DELETE message is null, " +
		"please check the Postgres table has been set REPLICA IDENTITY to FULL level. " +
		"You can update the setting by running the command in Postgres 'ALTER TABLE %s REPLICA IDENTITY FULL'. " +
		"Please see more in Debezium documentation: https://debezium.io/documentation/reference/1.2/connectors/postgresql.html#postgresql-replica-identity";

	private final String schemaTable;

	public PostgresValueValidator(String schema, String table) {
		this.schemaTable = schema + "." + table;
	}

	@Override
	public void validate(RowData rowData, RowKind rowKind) throws Exception {
		if (rowData == null) {
			throw new IllegalStateException(String.format(REPLICA_IDENTITY_EXCEPTION, schemaTable));
		}
	}
}
